Apparatus for making compound metal ingots.



' No. 639,005. 7 Patented Dec. l2, I899.

- J. 0. E. morz. APPARATUS FOR MAKING CUMPUUND METAL INGOTS.

(Application filed July 2, 1898.)

(No Model.)

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bottom of the ingot-molds and allowing it to Unrrnn STATES PATENT JOI-IAN OTTO EMANUEL TROTZ, OF "WORCESTER, MASSACHUSETTS.

APPARATUS FOR MAKING COMPOUND METAL INGOTS.

SPECIFICATION forming part of Letters Patent No. 639,Q05, dated December 12, 1899. Application filed July 2, 1898. Serial No. 685,075. NO modem ctZZ whom it may concern:

Be it known that I, JoHAN Orro EMANUEL TROTZ, of the city and county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Apparatus for Making Compound Metal Ingots; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, and in whicht Figure 1 represents a top or plan view of an apparatus for casting ingots composed of two or more grades of steel. Fig. 2 represents a side view, partly in section, of the parts shown in Fig. 1. Figs. 3 and 4 are a side and bottom plan view, respectively, of a clamp device for holding the top of the hard bloom or core of the ingot in position in the mold, as and for the purpose hereinafter described. Fig. 5 is a horizontal section on line a, Fig. 6, through part of the cast-iron bed and also part of the channeled fire-brick base embedded therein for conducting the molten metal to the mold and upon which the bottom of the hard bloom or core principally rests, as will also be hereinafter described; and Fig. 6 is a vertical section through the parts shown in Fig. 5 and through the bottom of the ingotmold and said hard bloom or core, the same being a modification of the construction shown My invention relates to what is commonly termed bottom casting-that is, castings made by introducing the molten metal at the flow upward therein; and it consists in combining with each mold and its hard bloom or core around which the molten metal flows a fire-brick base of special construction and a top-clamp device for holding said hard bloom or core in position, as will be hereinafter more fully set forth.

To enable those skilled in the art to which myinvention appertains to better understand the nature and purpose thereof, I will now proceed to describe it more in detail with reference to the accompanying drawings.

In said drawings the parts marked A represent a numberof ingot-molds grouped upon a cast-iron bed B around a central vertical conductingpipe O, which is provided with a protecting-lining of refractory material D. Said central pipe and the ingot-molds rest principally upon a fire-brick base E, which is recessed into the top of the aforesaid metal bed 13, as is shown in Figs. 2, 5, and 6. Said fire-brick base is made in several sections and is provided with channels or ducts E, which radiate from the center to each ingot-mold, the same connecting with the vertical opening of the conducting-pipe O and with each of the molds. The outer end of each channel terminates in a chamber E", which is preferably a little smaller in transverse diameter than the size of the bottom of the opening in the mold, as is shown in Figs. 2 and 5, for the purpose hereinafter described. In said chamber E is formed a vertical base E projecting up from the bottom of the fire-brick to about the level of the top surface of said fire-brick, upon which the hard bloom or core F, previously alluded to, is placed to support itin position vertically. An annular chamber is thus formed around said base E for the entering molten metal to flow through and surround said hard bloom or core F as it passes up into the mold. By this construction said molten metal as it flows into the chamber E is distrib uted around the hard bloom or core and flows upward in a uniform volume into the mold, thereby forming a casting of uniform texture and quality around said hard bloom or core, and in consequence a superior finished product. By thus first introducing the molten metal into an annular chamber coming below the level of the mold and its hard bloom. or core before entering said mold the latter and also the hard bloom or core are prevented from being eaten away by said molten metal as rapidly as they otherwise would be if such provision were not made, and to facilitate the protection thus afforded said parts from the first intense heat of the molten metal the outer walls of the annular chamber E are made to come a little inside of the wall'of the mold, as previously described, and shown in the drawings. Therefore the molten metal in its upward motion does not at once directly strike said wall or inside surface of the mold, and thereby in a measure protects the same.

The hard bloom or core may be of any suitable size, shape, quality, or kind of metal suitable for producing the desired compound metal.

The hard bloom or core may be constructed so as to rest in a slight depression formed in the top of the supporting-base E as is shown in Fig. 2, or its bottom end made to fit in a vertical opening in said base, as is shown in Figs. 5 and 6, or in any other suitable and convenient manner.

A lining G of refractory material may be used upon the inside of the ingot-mold, as is shown in Fig. 6, or the same used without it, as preferred.

To facilitate the molten metal properly adhering to the hard bloom or core, the latter should be cleaned and heated before pouring the molten metal around the same.

The top of the hard bloom or core of each mold is held in position laterally by means of a clamp device H, which is provided with downwardly-projecting lugs H H, adapted to fit into the top of the mold, and with transverse screws H H which may be turned up against the hard bloom or core when the clamp is fitted in position over the mold, as is shown in the drawings.

Having now described my invention, What I claim therein as new, and desire to secure by Letters Patent, is

1. In an apparatus for casting compound metal ingots, the combination of the ingotmolds, conducting-pipe, and metal bed with a fire-brick base fitted in said metal bed, havmetal ingots, the combination of the ingotmold and metal bed, with a fire-brick base fitted in said metal bed, having a chamber under said mold and also provided with an upward-projecting support for the hard bloom or core to foot upon, substantially as and for the purpose set forth.

. In an apparatus for casting compound metal ingots, the combination of the ingotmold, with a clamp device for holding the top of the hard bloom or core in position laterally, said clamp device being provided with downward-projecting lugs adapted to fit into the top of the mold and With set screws adapted to bear against the hard'bloom or core, substantially as set forth.

JOHAN OTTO EMANUEL TROTZi Witnesses:

W. B. NoURsE, A. A. GILBERT. 

